Name of Accreditation Program

JCSS Accreditation Program

Accreditation Identification

JCSS 0149 Calibration

Name of Conformity Assessment
Body

Calibration Center, Yamamoto Scientific Tool Laboratory Co., Ltd.

Name of Legal Entity

Inquiry Point*JCN: Japan Corporate Number

Yamamoto Scientific Tool Laboratory Co., Ltd.
JCN 2040001007658
Calibration Center
TEL: +81-47-431-7451

FAX: +81-47-432-8592

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2 0 2 4 - 0 3 - 2 2

Certificate of Accreditation
International Accreditation Japan (IAJapan) hereby accredits the following
conformity assessment body as a calibration laboratory of Japan Calibration
Service System.
Accreditation Identification: JCSS 0149 Calibration
Name of Conformity Assessment Body: Calibration Center,
Yamamoto Scientific Tool Laboratory Co., Ltd.
Name of Legal Entity: Yamamoto Scientific Tool Laboratory Co., Ltd.
Location of Conformity Assessment Body: 2-15-4 Sakae-cho, Funabashi-shi, Chiba 273-0018, JAPAN
Scope of Accreditation: Hardness (as the following pages)
Accreditation Requirement: ISO/IEC 17025:2017** The relevant accreditation requirements described in the Accreditation
Scheme Document for JCSS are also applied.

Effective Date of Accreditation: 2024-03-23
Expiry Date of Accreditation: 2028-03-22
Date of Initial Accreditation: 2009-01-29

SAITO Kazunori
Chief Executive, International Accreditation Japan (IAJapan)
National Institute of Technology and Evaluation- International Accreditation Japan (IAJapan) is a laboratory accreditation body which has signed MRAs of ILAC (International Laboratory
Accreditation Cooperation) and APAC (Asia Pacific Accreditation Cooperation).
- MRA requirements are, in addition to relevant international standards and guides, requirements for participation in proficiency testing
programs, surveillance and reassessment, and the policy for the traceability of measurement for MRA purpose.
- This laboratory fulfills ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories. Thisaccreditation means this laboratory meets both the technical competence requirements and management system requirements that arenecessary for it to consistently deliver technically valid test results and calibrations (refer to joint ISO-ILAC-IAF Communiqué dated April2017).
- The latest accreditation information is publicly available on IAJapan Website as an accreditation certificate.

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General Field of Calibration: Hardness
Date of Initial Accreditation of the Field: 2009-01-29
Laboratory’s permanent facility/On-site Calibration: Laboratory’s permanent facility
Calibration and Measurement Capabilities
Calibration Procedures# andType of Instruments/Materials
to be calibrated
Rockwell Hardness
Rockwell Hardness
Testing Machines, etc.
Reference Block

Vickers Hardness
Testing Machines, etc.

Vickers Hardness
Reference Block

From 20 HRC up to 25 HRC

Expanded Uncertainty(Level of Confidence
Approximately 95 %)0.49 HRC

More than 25 HRC less than 35 HRC

0.51 HRC

From 35 HRC up to 45 HRC

0.50 HRC

More than 45 HRC less than 55 HRC

0.43 HRC

From 55 HRC up to 65 HRC

100 HBW 10/3000

0.35 HRCa) d < 190 μm
0.142+( 410 / d) %b) d≧ 190 μm
2.3 %Where: d is the length of adiagonal line of the indentation
1.7 %150 HBW 10/3000

1.6 %180 HBW 10/3000

1.6 %200 HBW 10/3000

1.6 %229 HBW 10/3000

1.3 %250 HBW 10/3000

1.3 %300 HBW 10/3000

1.3 %350 HBW 10/3000

1.3 %400 HBW 10/3000

1.3 %450 HBW 10/3000

1.3 %500 HBW 10/3000

1.3 %550 HBW 10/3000

1.3 %

600 HBW 10/30001.3 %650 HBW 10/3000

1.3 %

Range

From 85 HV up to 1050 HV
Test force
From 0.09807 N up to 490.4 N(From HV 0.01 up to HV 50)

Brinell Hardness
Testing Machines, etc.

Brinell Hardness
ReferenceBlock

50 HBW 10/1500

1.7 %100 HBW 10/1500

1.6 %150 HBW 10/1500

1.6 %200 HBW 10/1500

1.5 %250 HBW 10/1500

1.3 %300 HBW 10/1500

1.3 %50 HBW 10/1000

1.6 %100 HBW 10/1000

1.6 %150 HBW 10/1000

1.5 %200 HBW 10/1000

1.5 %50 HBW 10/500

1.6 %

100 HBW 10/500

1.5 %

100 HBW 5/750

1.7 %

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Attachment

150 HBW 5/750

1.6 %180 HBW 5/750

1.6 %

200 HBW 5/750

1.6 %229 HBW 5/750

1.3 %

250 HBW 5/750

1.3 %

300 HBW 5/750

1.3 %

350 HBW 5/750

1.3 %400 HBW 5/750

1.3 %450 HBW 5/750

1.3 %

500 HBW 5/750

1.3 %

550 HBW 5/750

1.3 %

600 HBW 5/750

1.3 %650 HBW 5/750

1.3 %#All Calibration Procedures are in-house procedures developed by this laboratory.

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